The most major citrus in Japan is Satsuma mandarin (Japanese orange).
The amount of shipment of Satsuma mandarin has decreased since the 1970s.
People started to choose the other fruits such as orange which started being imported from the United States in 1991 without tariff.
Japanese citrus have to compete with oranges from the US.
Many varieties have been developed to attract consumers.
Now we can enjoy many types of citrus harvested in Japan.